Bobbin.



G. H. BENJAMIN- BOBBIN.

AmIcAnoN man JUNE 25.11912.

1,1565579. rPawnfed 00t.12,1915.

GEORGE BILLARD BENJAMIN, OF NEW YORK, N. Y.

BOBBIN.

Specification of Letters Patent.

Patented Oct. 12, 1915.

Application 1ed .Tune 25, 1912. Serial No. 705,727.

the base or head will' clutch or grasp a spindle stem, or otherwise establish such a relation between them as to insure coincident rotary movement of the spindle and bobbin.

My invention further relates to theemployment of means for separating the bottom of the-bobbin from the top of the spindle whirl, and also to means whereby the interior cavity of the head of the' bobbin may be adjusted to the size or shape of the spindle stem.

In practice it has been found that where the head of a bobbin is made of metal, and the interior periphery of this head smooth, that the frictional resistance between the metallic surface of the interior of the head and the spindle stem is not sulicient to insure coincident rotary movement of the two. Further, thatif the metallic head of the bobbin iS allowed to come 'in Contact with the top of the spindle whirlp-the thread on the bobbin will be crushed or broken, and that therefore it is desirable to separate the bot-.

tom of the bobbin from the top of the spindle whirl, or to provide a cushioned surface for the top ofthe spindle' whirl,or bottom of the bobbin. Further that all spindle stems have not the same size or shape, and as it is desirable that the hobbius shall he oi' uniform size and shape, itis necessary to provide means which shall be introduced hetween the spindle stem and the'bobhin to compensate for such diTerencc in size or shape of the various parts.

The accompanying drawings will serve to illustrate my invention, in which- Figure 1 is an elevation oi a spindle with a vertical section of a bobbin mounted thereon, and also showing a cross section of an elastic body between the bottom of the bobbin and the top of the spindle whirl. Fig. 2 is a vertical section of the bobbin detached from the spindle. Fig. 3 is a section taken on the line V-V of Fig. 2. Fig. 4 is a pers'pective view of the base or head shown in Figs. 1., 2 and 3. Fig. 5 is a vertical section of a modification. Fig. 6 is a section taken on the line VV-lV of Fig. 5. Fig. 7'is a ver- .tical section of another modification. Fig. 8 is a transverse section taken on the line X-X of Fig. 7. Fig. 9 is a vertical section of another modification.y Fig. 10 is a transverse section taken .on the line Y-Y of Fig. 9. I Figs. 11 and 12 are elevations of a spindle stem with vertical sections through the base or head and vertical sections through the adjusting devices. Fig. 13 is a transverse section taken on the line Z-Z of Fig. 12.A

Referring to the drawings, 20 indicates a spindle; 2l, spindle stem; 22, whirl. Mounted on vthe spindle (in Fig. is a bobbin which consists of the shank 23; base or head 24. The base or head in each of the iigures is annular in shape. The outer periphery 25 is shown as smooth, and the inner` periphery 2G variously shaped. In Figs. l, 2, 3 and 4 the inner periphery is split at different points to formspring Asections 27, alternate sections being bent inward so as to grasp the base oi the stem 21 of the spindle. In Figs. 5 and 6 the inner peform two series of springs 28 and 29. In Fig. 7 the inner periphery has formed in it a groove 30, in which is located a split ring 3l. In Fig. 9 the inner periphery is provided with a groove 3() in which is located a coil spring 32.' l.` he springs, split ring and the coil spring, all serve to grasp the base of the stem 21 of the spindle, and thus establish a practically fixed relation between thel provide separating devices.l In Fig. 2 the device shown consists of projections 33 depending from the bottom of the base or head. Instead of using the projections, a soft washer 34 may he located over the top of the spindle whirl. Where the size or shape of the inner opening of 'the bobbin vriphery is split at the top and bottom to differs from that of 'the spindle stem and base, a tubular washer 35 may be employed. In Figs. 11 and l2 this washer is shown as having a vertical portion 36 and a horizontal portion 37, taking the place of the washer 34 of Fig. l. This washer may be ot' soft material, such as felt or rubber, and it may he provided with corrugations 38 on its exterior surface to coperate with correspond ing corrugations 39 on the interior periphery of the base or head. Likewise the washer may be provided with clutching devices, similar in construction to those illustrated for the interior of the base or head, as shown in the various figures.

In Figs. 11 and 12 the parts are. shown as slightly separated, this form of illustration being used for the purpose of indicating that the washer acts as an adjusting means between the spindle and the head of the bobbin, and is not intended to represent that the partsv are separated in actual use, except in so far as is necessary by reason of the difference in shape and diameter of the various parts.

In the various figures the bobbin is shown as provided with parallel rings 40 which are arranged around the wooden portion of the base of the stem. n l

Having thus described my invention, I claim:

l. A bobbin comprising a shank portion, an annular base having its internal wall carried upward -for a suiiicient distance to insure centering of the bobbin upon a spindle,

and a clutch portion adapted to coact with.

the stem of a spindle when placed upon a spindle.

2. A bebbin comprising a shank portion,

an annular base having its internal wall carried upward for a sutlicient distance to insure centering the bobbin upon a spindle,

and a clutch portion forming 'a part of the interior wall of said annular portion.

A bobbin comprising a base shaped as an annulus and having its internal wall carried upward for a sufficient distance to insure centering of the bobbin upon a. spindle, and said wall constructed to serve as a clutch.

4. A bobbin comprising a shank portion, nn annular metallic base having its internal wall carried upward for a suiiicient distance to insure centering of the bobhin upon a spindle, and such wall provided with a clutch on its interior adapted to coact with the stem -ot' a spindle when placed upon a spindle. v

5. A bobbin comprising a shank portion, a metallic annulus forming a head shaped to inclose the lower portion ofthe outer wall, the bottom, and the whole inner wall of the h xador' the shank,.and formed on its interior to serve as a clutch to cooperate with the stem of a spindle when placed upon a spindle. i

6. A bobbin comprising a shank having a head portion, an annulus inclosing the head portion, said annulus substantially tubular in section at its inner wall, and said wall carried up to cover the internal surface of the head portion and for a sufiicient distance to insure centering ofthe bobbin upon a" spindle,and a clutch device adapted to` cooperate with the inner wall of the annulus ,and a spindle, when the bobbin is placed on a spindle.

In testimony whereof, aiiiX my signature,in the presence of two witnesses, GEORGE HiLLARD BENJAMIN.

Witnesses: f l i y HELEN E. KoELscH, MARCEL MULE'r. 

